Impacts of Anthropogenic Heat on Summertime Rainfall in BeijingSource: Journal of Hydrometeorology:;2016:;Volume( 018 ):;issue: 003::page 693DOI: 10.1175/JHM-D-16-0173.1Publisher: American Meteorological Society
Abstract: nthropogenic heat is an important component of the urban energy budgets that can affect land surface and atmospheric boundary layer processes. Representation of anthropogenic heat in numerical climate modeling systems is therefore important when simulating urban meteorology and climate and has the potential to improve weather forecasts, climate process studies, and energy demand analysis. Here, spatiotemporally dynamic anthropogenic heat data estimated by the Building Effects Parameterization and Building Energy Model (BEP-BEM) are incorporated into the Weather Research and Forecasting (WRF) Model system to investigate its impact on simulation of summertime rainfall in Beijing, China. Simulations of four local rainfall events with and without anthropogenic heat indicate that anthropogenic heat leads to increased rainfall over the urban area. For all four events, anthropogenic heat emission increases sensible heat flux, enhances mixing and turbulent energy transport, lifts PBL height, increases dry static energy, and destabilizes the atmosphere in urban areas through thermal perturbation and strong upward motion during the prestorm period, resulting in enhanced convergence during the major rainfall period. Intensified rainfall leads to greater atmospheric dry-down during the storm and a higher poststorm LCL.
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contributor author | Nie, Wanshu | |
contributor author | Zaitchik, Benjamin F. | |
contributor author | Ni, Guangheng | |
contributor author | Sun, Ting | |
date accessioned | 2017-06-09T17:17:20Z | |
date available | 2017-06-09T17:17:20Z | |
date copyright | 2017/03/01 | |
date issued | 2016 | |
identifier issn | 1525-755X | |
identifier other | ams-82461.pdf | |
identifier uri | http://onlinelibrary.yabesh.ir/handle/yetl/4225577 | |
description abstract | nthropogenic heat is an important component of the urban energy budgets that can affect land surface and atmospheric boundary layer processes. Representation of anthropogenic heat in numerical climate modeling systems is therefore important when simulating urban meteorology and climate and has the potential to improve weather forecasts, climate process studies, and energy demand analysis. Here, spatiotemporally dynamic anthropogenic heat data estimated by the Building Effects Parameterization and Building Energy Model (BEP-BEM) are incorporated into the Weather Research and Forecasting (WRF) Model system to investigate its impact on simulation of summertime rainfall in Beijing, China. Simulations of four local rainfall events with and without anthropogenic heat indicate that anthropogenic heat leads to increased rainfall over the urban area. For all four events, anthropogenic heat emission increases sensible heat flux, enhances mixing and turbulent energy transport, lifts PBL height, increases dry static energy, and destabilizes the atmosphere in urban areas through thermal perturbation and strong upward motion during the prestorm period, resulting in enhanced convergence during the major rainfall period. Intensified rainfall leads to greater atmospheric dry-down during the storm and a higher poststorm LCL. | |
publisher | American Meteorological Society | |
title | Impacts of Anthropogenic Heat on Summertime Rainfall in Beijing | |
type | Journal Paper | |
journal volume | 18 | |
journal issue | 3 | |
journal title | Journal of Hydrometeorology | |
identifier doi | 10.1175/JHM-D-16-0173.1 | |
journal fristpage | 693 | |
journal lastpage | 712 | |
tree | Journal of Hydrometeorology:;2016:;Volume( 018 ):;issue: 003 | |
contenttype | Fulltext |